Question

Server keeps disconnecting...

Asked by: calinutz

I have a problem: My PostgreSQL server runs on a FreeBSD server.
The server is in a LAN.
The LAN's router forwards the 5432 port for external connections to the server.
I have a database on the server.
I access this database from 2 types of locations:
    - LAN
    - WAN
(using of course as Host the LAN IP for local connections and the WAN IP for external connections)

When I start an application from inside the LAN, I have no problems.
When I start the same application from WAN, the connection dies in a few minutes after last user input.

So If I start pgAdmin III from a WAN location, I can connect easily to the server, but if I do not work with the connection for 1-2 minutes... the connection brakes, so when I try after 2 minutes to do something in pgAdmin, I receive error messages:
"An error has occurred:
server closed the connection unexpectedly.
This probably means the server terminated abnormally
before of while processing the request".
I get this message always 3 times.  

When I connect to the database using Delphi (all the same settings)  the same behavior happens. From LAN ... no problem, from WAN... after leaving the application alone... it disconnects from the server.

I do not understand this problem. It is probably somewhere in the postgresql.conf file. I did not modify it when building the server...
I will paste it if you need it in order to help.

Please advise

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Asked On
2009-11-01 at 08:35:35ID24861960
Tags

postgresql

,

server

,

disconnection

,

connection

Topic

PostgreSQL Database

Participating Experts
2
Points
0
Comments
8

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Answers

 

by: poweredsPosted on 2009-11-01 at 10:56:52ID: 25714890

Hi,

Try checking /var/lib/pgsql/data/pg_hba.conf on the section below.

# TYPE       DATABASE    IP_ADDRESS    MASK               AUTHTYPE  MAP

# Allow any user on the local system to connect to any
# database under any username, but only via an IP connection:

host         all         127.0.0.1     255.255.255.255    trust


Hope this helps.

 

by: poweredsPosted on 2009-11-01 at 10:57:55ID: 25714894

 

by: poweredsPosted on 2009-11-01 at 10:58:32ID: 25714895

Please modify IP adress as per your requirement. Thanks.

 

by: earthman2Posted on 2009-11-02 at 06:28:29ID: 25719553

This be related to your postgresql.conf  configuration for tcp socket KEEPALIVE option and Operating System defaults with different behaviour occuring betwee WAN and LAN.
see postgresql docs for
tcp_keepalives_idle (integer)
tcp_keepalives_interval (integer)
tcp_keepalives_count (integer)

 

by: earthman2Posted on 2009-11-02 at 06:30:49ID: 25719589

is KEEPALIVE  enabled in pgAdmin application ?

 

by: calinutzPosted on 2009-11-10 at 15:16:39ID: 25790994

yes earthman2 it is enabled

 

by: calinutzPosted on 2009-11-10 at 15:19:38ID: 25791022

powereds: pg_hba is configured properly... so no problem there...
trust me.
I have several applications running on other Freebsd, postgressql server with similar configuration running just fine.

 

by: calinutzPosted on 2009-11-11 at 19:00:46ID: 25801240

My conclusion after several days of waiting is that no helping information was submited here for my question/problem.
I assume that a hardware issue causes the repeated disconnection from my server.
I will ask for a refund of my points.
Thank you anyway

20120131-EE-VQP-002

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